sedimentary

Prehistoric worked flint/chert artifacts

Microcrystalline quartz (SiO₂), chiefly chalcedony or chert; possible fossil-bearing chert

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; dull to waxy luster; cream, tan, and reddish-brown colors; cryptocrystalline quartz with conchoidal fracture and no cleavage. The sharp edges and repeated flaking strongly indicate intentional knapping, rather than natural crystals.

Identified August 30, 2026More sedimentary →

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At a glance

Common name: Prehistoric worked flint/chert artifacts
Scientific name: Microcrystalline quartz (SiO₂), chiefly chalcedony or chert; possible fossil-bearing chert
Category: sedimentary
Identified: August 30, 2026
Method: Standard

AI Estimated Value

Common undocumented flakes: $1–$20 each; authenticated, legally collected tools: roughly $25–$300+, with exceptional provenance or rarity potentially higher.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Chert forms when silica replaces sediment or accumulates in limestone, commonly during Paleozoic–Mesozoic marine deposition. These pieces appear human-worked, but their exact age cannot be determined from the photograph; the Wyoming region can contain abundant chert and prehistoric lithic artifacts.

Uses & applications

Originally used for cutting, scraping, hunting points, and drills; today mainly archaeological or educational collectibles. Scientific value depends on documented provenance and legal collection status.

Geological facts

The upper pieces resemble flakes or small bifacial tools, while the lower-right piece resembles a small projectile point or drill. Surface alteration and coloration may reflect weathering, heat treatment, or patination.

Field identification & locations

Identify by sharp conchoidal edges, bulbs of percussion, flake scars, and deliberately shaped margins. Similar material occurs throughout Wyoming, but archaeological artifacts should not be removed from public or protected land; professional authentication is recommended.